Place the eggs in a pot of water and cook for 9 minutes
Peel the eggs, cut into 2 halves and pick the yolks from all the eggs
Grate the zucchini on a medium grater and cook for 8 minutes
In a deep bowl, mix stewed zucchini with grated cheese, mayonnaise and 1 egg yolk and salt.
In another bowl, mix tuna, chopped green onion and 1 egg yolk
Fill the eggs with the prepared filling and decorate with fennel or dill.